Аннотация:Abstract Abstract The classroom practices of protégés assisted by mentors who participated in a formal mentoring program were compared with protégés mentored by experienced teachers with no formalized mentoring preparation. Forty-six protégé-mentor pairs (23 treatment; 23 comparison) participated in this study conducted in 2 large school consortia in a mid-western state. Data include ratings and narrative records from classroom observations, weekly summaries of mentoring activities, and ratings of students' classroom behavior. Results indicate that protégés of mentors participating in the mentoring program could more effectively organize and manage instruction at the beginning of the year and establish more workable classroom routines. Also, their students had better behavior and engagement. Findings are discussed in light of the possible relationships between particular mentoring practices and protégés' learning to teach.